US2573465A - Method of producing wooden boards secured against warping - Google Patents

Method of producing wooden boards secured against warping Download PDF

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Publication number
US2573465A
US2573465A US717974A US71797446A US2573465A US 2573465 A US2573465 A US 2573465A US 717974 A US717974 A US 717974A US 71797446 A US71797446 A US 71797446A US 2573465 A US2573465 A US 2573465A
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United States
Prior art keywords
boards
block
glued
strips
board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US717974A
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English (en)
Inventor
Lundberg Axel Eugen
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/22—Manufacture or reconditioning of specific semi-finished or finished articles of sport articles, e.g. bowling pins, frames of tennis rackets, skis, paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/06—Manufacture of central layers; Form of central layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0026—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally
    • B27M3/0053—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally using glue
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S52/00—Static structures, e.g. buildings
    • Y10S52/07—Synthetic building materials, reinforcements and equivalents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1043—Subsequent to assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/108—Flash, trim or excess removal

Definitions

  • the present invention refers to a method of producing wooden parts or workpieces secured against warping.
  • the invention is principally distinguished by the feature that boards, strips or the like are forcibly bent and glued together in their bent condition with the curved surfaces thereof placed on each other, whereupon the block thus obtained is subjected to further treatment to form compound boards, slabs, larger or smaller blocks or the like.
  • the block formed from the elements glued together in their forcibly bent condition is divided in the further treatment, preferably by saw-cuts, the cutting planes of which extend in the longitudinal direction of the curved edges of the glued joints so as to divide the individual surfaces of the glued joints in parts running alongside of each other.
  • the cuts are preferably made so that the cutting planes extend substantially at right angles to the surfaces of the glued joints.
  • Fig. 1 is a perspective view of blocks consisting of curved boards glued together.
  • Fig. 2 illustrates the disposition of compound boards orslabs .sawn out of the block according .to Fig. V1 in the gluing thereof.
  • Fig. 3 shows a compound board glued together in accordance with Fig. 2.
  • Fig. 4 is an endwise view of the compoundboard according to Fig. 3
  • Fig. 5 is also an endwise view of a second example of embodiment relative to the gluing of the strips.
  • Figs. 6 and '7 illustrate further examples of the gluing of blocksand of compound boards cut from a block, respectively.
  • Fig. 8 shows a method of gluing the primary block.
  • Fig. 9 shows a cross section on line X-X in Fig. 8.
  • Fig. 10 and Fig. 11 show embodiments relative to the use of slabs produced in accordance with the method according to the invention.
  • the block shown in Fig. l is produced by the bending of a numberof strips or boards I, which are glued together in their curved condition.
  • the edge lines 3 of the surfaces 2 of the glued joints will thus extend in arcs along the sides of the block Should one of the individual boards of the block tend toward warping, this would obviously manifest itself so that the board would have a tendency to twist about a longitudinal line of the wood. However, such twisting may be expected to be counteracted by the strip lying adjacent thereto.
  • Slabs or board-like parts are cut out of the block, which parts are likewise secured against warping. These parts mayinturn be glued together, in a manner such that any remaining tendency toward warping will be further counteracted.
  • a and B designate two compound boards or slabs cut from the block according to Fig. 1 in the above-stated manner, the end portions of such compound boards (for the sake :of simplicity in the following called boards.) being denoted by a and b and a and b, respectively. If a wider compound board is desired, the board .13 is placed with its longitudinal side 0 against the corresponding longitudinal side c of the board A, so that the board B will take the position shown by chain-dotted lines, in which it is glued together with the board A.
  • the first-mentioned board should preferably be turned at the same time in the longitudinal direction, so that the edge a will be brought into the extension of the edge I) of the board A, as indicated by the designations at the chain-dotted slab B in Fig. 2..
  • Fig. 3 shows a board .glued togethed in the manner described above. This board may in turn be divided into .two boards C and D, Fig. 4, by
  • the members C and D may then, preferably after at least one of the boards has been turned entirely, be glued together ina-manner such that the sides (2 and al which were previously turned outwardly, will lie in contact.
  • Fig. 6 shows two boards A and B glued together in the manner set forth with reference to Fig. 2, the glued joint of which boards is denoted by 10.
  • the curved edges 3 of the glued joints extend in an undulatory fashion, the wave crests touching each other in the glued joint [0.
  • the boards A and B. may be displaced longitudinally relatively to each other, so that the said. wave crests. will be displaced with respect to one. an.
  • two or more blocks from boards or strips glued together may also be glued to each other, particularly if it is desired to saw slabs of a large width from them.
  • Fig. '7 shows two boards or slabs corresponding to the boards C and D in Figs. 4 and 5. These boards are displaced relatively to each other in such manner that the arcuate or undulatory edges 3 of the glued joints are displaced with respect to each other, before the boards C and D are glued together.
  • the boards A and B of Fig. 2, for example, may be glued together in the same manner.
  • Figs. 8, 9 illustrate a method of gluing the primary block according to Fig. 1 together.
  • the strips, boards or battens denoted by I are inserted in great lengths of many feet, for instance, into a press, the foundation of which is designated by H, while the movable part thereof is denoted by (2.
  • the latter part presents a lower surface 43 of the undulatory shape which it is desired to impart to the boards.
  • the upper side of the foundation may be constructed in the same manner with an undulatory upper surface, it being preferred, however, to arrange on the foundation a special mould having an undulatory upper surface.
  • the contact surfaces of the boards coated with an adhesive are gued together at a simultaneous bending of the boards, when the movable part I2 is set in a direction against the rigid part II.
  • the gluing of the boards having been completed, the upper portion is cut plane by a saw-cut on the line It.
  • the portion l5 which is thus separated and presents an undulatory upper side, and which should be integral all over its length, is placed in the pressing of the following block beneath the latter, that is to say into the position marked by l5, and is glued to the block then formed.
  • the piece I5 thus serves as a mould in the bending of the boards lying thereabove.
  • the finished block now presents parallel upper and lower sides.
  • the pressing device according to Fig. 8 may be constructed in various ways from a mechanical point of view.
  • the upper part i6 of the press may be rigid, only the part I2 being vertically displaceable.
  • the pressing movement thereof may be eifected with the aid of two or more rubber tubes [1 disposed beside one another and supplied with air or liquid under a high pressure in the pressing operation.
  • the boards or slabs produced in the manner above described such as the board A and B or the board C, D, or only one board A, may in turn be bent and glued together, if desired, with similar board in their curved condition.
  • the boards are then bent in the transverse direction when glued together.
  • a number of boards E thus glued together are shown in Fig. 10, which illustrates a cross section through a ski, the portion of which that forms the running surface is designated by H).
  • the last-mentioned part may also be produced from plane elements glued together in accordance with the invention.
  • Fig. 11 shows a cross section of a beam may also be produced with the aid of the woodenv material glued together. If desired, a single board or slab (or block) F may be made use of,
  • said slab having a securing bar glued thereto at.
  • the slabs produced according to the invention are used for building purposes or the like, or for skis or the like, the slabs consisting of laminated wood or block wood may be covered with a wooden coating for example plywood on the one vor the other side.
  • the method of producing wooden planks resistant to warping which comprises assembling a plurality of glue coated elongated wooden strips into a stack with the strips extending in the same direction longitudinally of the stack, deforming the strips in the stack by applying pressure to bend the same along curved lines extending longitudinally from end to end of the stack, maintaining the stack pressure to retain the deformed condition until the glue has set to form a rigid block, leveling at least one longitudinal edge of the block thus formed sawing the block thus formed into slabs by longitudinal saw cutsextending substantially at right angles to the face of the glued joints between the strips, assembling two of such slabs in parallel co-planar relation with the levelled edges abutting and in such relation that the strips forming the same extend longitudinally thereof and the bends of the strips in one are oppositely disposed with respect to those in the other, and gluing the abutting edges of the so assembled slabs together to form a plank.
  • The. method of producing wooden planks resistant to warping which comprises assembling a plurality of glue coated elongated wooden strips into a stack with the strips extending in the same direction longitudinally of the stack, deforming the strips in the stack by applying pressure to bend the same along curved lines extending longitudinally from end to end of the stack, maintain-- ing the stack pressure to retain the deformed condition until the glue has set to form a rigid block, levelling the longitudinal edges of the blocks thus formed, assembling two of such blocks with levelled edges abutting and with the relation of the blocks such that the strips forming the same extend longitudinally thereof in the same direction and the bends of the individual strips in one block are oppositely disposed with respect to those in the other, gluing the so assembled blocks together and sawing the so assembled and glued blocks into planks by saw cuts extending longi tudinally substantially at right angles to the surface of the glued joints thereof.
  • the method of producing wooden planks resistant to warping which comprises assembling a plurality of elongated wooden strips into a stack with the strips extending in the same direction longitudinally of the stack and with glue applied to the contacting faces thereof, assembling with said stack a wooden mold block having a glued surface.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
US717974A 1945-12-22 1946-12-23 Method of producing wooden boards secured against warping Expired - Lifetime US2573465A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2573465X 1945-12-22

Publications (1)

Publication Number Publication Date
US2573465A true US2573465A (en) 1951-10-30

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ID=20426297

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Application Number Title Priority Date Filing Date
US717974A Expired - Lifetime US2573465A (en) 1945-12-22 1946-12-23 Method of producing wooden boards secured against warping

Country Status (5)

Country Link
US (1) US2573465A (enrdf_load_stackoverflow)
CH (1) CH264048A (enrdf_load_stackoverflow)
DE (1) DE907823C (enrdf_load_stackoverflow)
FR (1) FR957305A (enrdf_load_stackoverflow)
GB (1) GB638002A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654608A (en) * 1949-11-16 1953-10-06 Albert S Liebers Golf club construction
US2790483A (en) * 1954-06-25 1957-04-30 Ederer Engineering Co Machine and method for the edgegluing of strip stock
US3047282A (en) * 1956-04-26 1962-07-31 Mobay Chemical Corp Upholstery units
DE19719442A1 (de) * 1997-05-07 1998-11-12 Schmuck Susanne Neue verwindungssteife Leimholzplatten
EP4296026A1 (fr) * 2022-06-10 2023-12-27 De Dreuille, Jean Procede de fabrication d'un objet en contreplaqué, pièce de mobilier et moule

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7901615L (sv) * 1979-02-22 1980-08-23 Statens Skogsind Ab Sett att framstella lamellvirke genom hoplimning av sagat virke
DE3425204C1 (de) * 1984-07-09 1985-07-18 Jenkner, Erwin, 7261 Gechingen Verfahren zum Parallelaufteilen von besaeumten Werkstueckplatten,insbesondere von kaschierten Pressholzplatten
FR2609926B1 (fr) * 1987-01-22 1992-01-24 Gauthier Sa Paul Procede de fabrication d'un mat en bois et mat ainsi obtenu
CN108582306A (zh) * 2018-05-18 2018-09-28 宋建平 以木材薄单板为原料的重组木方料生产方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US379685A (en) * 1888-03-20 coolby
US1078776A (en) * 1912-01-02 1913-11-18 John C Dunton Flooring.
US1183861A (en) * 1912-03-27 1916-05-23 Ernest P Everett Manufacture of barrels.
US1299705A (en) * 1918-01-16 1919-04-08 Perkins Glue Co Process of gluing wood.
US1324954A (en) * 1919-12-16 Storage-battery separator
US1871447A (en) * 1931-05-16 1932-08-16 Flexwood Company Method of flattening flexible sheets faced with wood
US2155375A (en) * 1937-03-31 1939-04-18 Jablonsky Bruno Pressed article, particularly airscrew blade, of laminated wood, and method of manufacture
US2245170A (en) * 1937-03-06 1941-06-10 Ende Emil Freiherr Von Method of producing veneers
US2245169A (en) * 1936-05-02 1941-06-10 Ende Emil Freiherr Von Compressed fibrous material
GB544137A (en) * 1940-08-07 1942-03-30 Arthur Cyril Merron Improvements in and relating to compound sheet materials and objects produced therefrom
US2409785A (en) * 1944-01-07 1946-10-22 Newmark David Method of producing balsa slices

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US379685A (en) * 1888-03-20 coolby
US1324954A (en) * 1919-12-16 Storage-battery separator
US1078776A (en) * 1912-01-02 1913-11-18 John C Dunton Flooring.
US1183861A (en) * 1912-03-27 1916-05-23 Ernest P Everett Manufacture of barrels.
US1299705A (en) * 1918-01-16 1919-04-08 Perkins Glue Co Process of gluing wood.
US1871447A (en) * 1931-05-16 1932-08-16 Flexwood Company Method of flattening flexible sheets faced with wood
US2245169A (en) * 1936-05-02 1941-06-10 Ende Emil Freiherr Von Compressed fibrous material
US2245170A (en) * 1937-03-06 1941-06-10 Ende Emil Freiherr Von Method of producing veneers
US2155375A (en) * 1937-03-31 1939-04-18 Jablonsky Bruno Pressed article, particularly airscrew blade, of laminated wood, and method of manufacture
GB544137A (en) * 1940-08-07 1942-03-30 Arthur Cyril Merron Improvements in and relating to compound sheet materials and objects produced therefrom
US2409785A (en) * 1944-01-07 1946-10-22 Newmark David Method of producing balsa slices

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654608A (en) * 1949-11-16 1953-10-06 Albert S Liebers Golf club construction
US2790483A (en) * 1954-06-25 1957-04-30 Ederer Engineering Co Machine and method for the edgegluing of strip stock
US3047282A (en) * 1956-04-26 1962-07-31 Mobay Chemical Corp Upholstery units
DE19719442A1 (de) * 1997-05-07 1998-11-12 Schmuck Susanne Neue verwindungssteife Leimholzplatten
DE19719442C2 (de) * 1997-05-07 2001-03-15 Schmuck Susanne Mehrschichtige Leimholzplatte
EP4296026A1 (fr) * 2022-06-10 2023-12-27 De Dreuille, Jean Procede de fabrication d'un objet en contreplaqué, pièce de mobilier et moule

Also Published As

Publication number Publication date
CH264048A (de) 1949-09-30
FR957305A (enrdf_load_stackoverflow) 1950-02-18
GB638002A (en) 1950-05-31
DE907823C (de) 1954-03-29

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